
B-63943EN/02 APPENDIX D.OPTICAL FIBER CABLE
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Reinforcing cover of external cable or cord
binding portion of internal cord type cable
Optical connecto
Optical fiber cord
Bending radius of 25 mm or more
(Make the bending radius as large
as possible.)
Bending radius of 50 mm or more (for reinforcing cover)
Bending radius of 25 mm or more (for cord binding portion)
(Make the bending radius as large as possible.)
Cable clamp
Fig. D(e) Fixing the cable with a clamp
• Any superfluous portion of the cable may be wound into a
loops. Should this prove necessary, make sure the
diameter of each loop is at least 150 mm (for an external
cable) or at least 100 mm (for an internal cord type cable).
Winding the cable into smaller loops may produce sharp
curves that exceed the specified bending radius limit
without the user being aware. Such bending can result in a
greater transmission loss, ultimately leading to a
communication failure.
• When using a nylon band (cable tie) as a cable clamp,
follow the instructions given below. Also, take care not to
apply a bending force to one particular part of the cable
when fixing it with a clamp. Failing to clamp the cable
correctly may cut or damage it.
(External cable)
Do not clamp the uncovered portion of the cable with a
nylon band. When clamping the cable by the
reinforcing cover, the clamping force is not an
important factor to consider. However, ensure that
the clamping force is as small as possible to ensure that
the reinforcing cover is not deformed by the clamping.
If possible, the clamping force should be 5 kg or less.
(Internal cord type cable)
Lightly clamp the optical cable with a nylon band so
that the cable shield is not deformed. If possible, the
clamping force should be 1 or 2 kg (make sure that no
force is applied to the cable). Due care is required
when clamping the internal cord type cable because its
cable shield is weaker than the reinforcing cover of the
external cable.